/Engine/Plugins/Experimental/GameplayGraph/Source/GameplayGraph/Public/Graph/GraphVertex.h
[UCLASS](Programming/UnrealArchitecture/Reference/Classes#classdeclaration)() class UGraphVertex : public [UGraphElement](API\Plugins\GameplayGraph\Graph\UGraphElement)
FOnGraphVertexP...
OnParentIslandSet
FOnGraphVertexR...
OnVertexRemoved